I want to begin my expressing my respect for the blog community at large. They provide a useful conduit for information, provide pressure to move issues and have emerged as a real source of people-power over the last few years (especially in the Progressive community).
I do believe however that Blogs are so rife with opinion and slant/spin that many of us have begun to discount information presented there as suspect. Because so many of the Blogs we read everyday are written by manipulative partisans consisting mostly of people trying to move their agenda along it reduces the impact of all Blogs.
I must give DKos credit since here there is a tendency for most serious diaries to backup claims expressed by identified sources but even that still doesn't take the opinion and slant out of them, they still are trying to convince the reader of one position or the other.
I know Blogs are not News outlets and not meant to be taken as such but I truly believe leaving out the tendency to spin and partisan invective would greatly improve their credibility.